Amazon RDS Enable Backup Retention

arazzo: 1.0.1
info:
  title: Amazon RDS Enable Backup Retention
  summary: Set an instance backup retention period immediately and poll until stable.
  description: >-
    Turns on (or extends) automated backups for a DB instance by setting its
    backup retention period and waiting for the change to apply. The workflow
    confirms the instance is available, submits a modify request that sets the
    BackupRetentionPeriod with ApplyImmediately, and polls DescribeDBInstances
    until the status settles back to available, looping while the instance is
    still modifying or backing-up. Every step spells out its request inline so
    the flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: amazonRdsApi
  url: ../openapi/amazon-rds-openapi.yml
  type: openapi
workflows:
- workflowId: enable-backup-retention
  summary: Set a DB instance backup retention period and wait for it to apply.
  description: >-
    Confirms the instance is available, modifies the backup retention period
    with ApplyImmediately, then polls until DescribeDBInstances reports the
    instance available again.
  inputs:
    type: object
    required:
    - dbInstanceIdentifier
    - backupRetentionPeriod
    properties:
      dbInstanceIdentifier:
        type: string
        description: The identifier of the DB instance to configure backups for.
      backupRetentionPeriod:
        type: integer
        description: The number of days to retain automated backups (0-35).
  steps:
  - stepId: confirmInstance
    description: >-
      Describe the DB instance to confirm it is available before changing the
      backup retention period.
    operationId: describeDBInstances
    parameters:
    - name: DBInstanceIdentifier
      in: query
      value: $inputs.dbInstanceIdentifier
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.dBInstances[0].dBInstanceStatus == 'available'
      type: jsonpath
    outputs:
      currentRetention: $response.body#/dBInstances/0/backupRetentionPeriod
  - stepId: modifyRetention
    description: >-
      Submit the modify request setting the backup retention period with the
      change applied immediately.
    operationId: modifyDBInstance
    parameters:
    - name: DBInstanceIdentifier
      in: query
      value: $inputs.dbInstanceIdentifier
    - name: BackupRetentionPeriod
      in: query
      value: $inputs.backupRetentionPeriod
    - name: ApplyImmediately
      in: query
      value: true
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      pendingStatus: $response.body#/dBInstance/dBInstanceStatus
  - stepId: pollInstance
    description: >-
      Describe the DB instance and inspect its status. While the instance is
      still modifying or backing-up the workflow loops back to poll again; once
      it is available the flow ends.
    operationId: describeDBInstances
    parameters:
    - name: DBInstanceIdentifier
      in: query
      value: $inputs.dbInstanceIdentifier
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/dBInstances/0/dBInstanceStatus
      appliedRetention: $response.body#/dBInstances/0/backupRetentionPeriod
    onSuccess:
    - name: stillApplying
      type: goto
      stepId: pollInstance
      criteria:
      - context: $response.body
        condition: $.dBInstances[0].dBInstanceStatus != 'available'
        type: jsonpath
    - name: available
      type: end
      criteria:
      - context: $response.body
        condition: $.dBInstances[0].dBInstanceStatus == 'available'
        type: jsonpath
  outputs:
    status: $steps.pollInstance.outputs.status
    appliedRetention: $steps.pollInstance.outputs.appliedRetention